晚泥盆世菊石和菊石相地层,在世界上有较广泛的分布,国外曾见于西欧的莱茵河地区、前苏联的乌拉尔和哈萨克斯坦、北美、北非和澳大利亚西部等地区;国内所见尚少,主要有西藏仲巴地区、华南黔桂地区和东北的大兴安岭地区(图1)。 The late Devonian ammonite and ammoniated facies strata have a wider distribution in the world. They have been seen in the Rhine region in Western Europe, the Urals and Kazakhstan in the former Soviet Union, North America, North Africa and western Australia in other countries. Less mainly in the areas of Zhongba, Tibet, South China, Guizhou and Guangxi and the Greater Xing’an Mountains in the northeast (Figure 1).